| With the continuous emerging of various types of electronic equipments, automatic test systems are being changed from a special-application type to a universal-application direction. However, due to the different "interface standards" have been applied in different instruments produced by equipment manufacturers, electronic equipment calibration and testing have been limited to a certain type of equipment or a particular manufacturer. Therefore, in order to achieve a common automatic test system and improve the efficiency of calibration and testing work. It is high time to develop a universal and extensible electronic equipment automatic calibration and detection software system which can be compatible with all common interface types.This article mainly describes the analysis and design process about auto-calibration of electronic measuring instruments and testing software systems, and describes the automatic test system(ATS) basic concept, system structure, and works principle. In addition, this article analyzes the development trend of the automatic test system and describes the research status at home and abroad, which basically implements the design object of common software-compatible instrument interface by using the function library of VISA I/O interface. What's more, the system also implements the design object that the software is independent of certain instrument resource, especially independent of verification rules or calibration methods. The system could be suitable for all kinds of standard instruments and electronic measuring instruments. Besides, users could edit the testing project, different standards of equipment and measuring instruments, and select the corresponding detection process according to their own requirements. The efficiency of the system has been improved. It has good versatility and scalability, and could be applicable to all levels of measurement testing departments in our country.
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